The phrase 'match black color blocks' refers to the act of pairing or coordinating black colored shapes or elements together in design or fashion. Black is a neutral color that pairs well with many other colors and can be used to create a sleek, modern look. In design, black color blocks are often used to create contrast or to divide a space visually. In fashion, black color blocks can be seen in various styles, from high fashion to streetwear, where designers use black blocks to create a bold and eye-catching aesthetic.